TM 10-3930-659-20 12-26.    PRIORITY VALVE RELIEF CARTRIDGE VALVE LEAKAGE TEST. 6. Remove plug (5) from hose (3). 7. Install new preformed packing (2) and hose (3) on adapter (1). FOLLOW-ON TASKS: • Install right transmission side guard (see paragraph 14-7) • Remove frame locking bar (see TM 10-3930-659 TA707603 12-66